KENNEDY SPACE CENTER, FLA. - In the Multi-Purpose Processing Facility, the SORCE satellite undergoes a solar array test. SORCE is equipped with four instruments that will measure variations in solar radiation much more accurately than anything now in use and observe some of the spectral properties of solar radiation for the first time. With data from NASA?s SORCE mission, researchers should be able to follow how the Sun affects our climate now and in the future. The SORCE project is managed by NASA?s Goddard Space Flight Center. The instruments on the SORCE spacecraft are built by the Laboratory for Atmospheric and Space Physics (LASP). Launch of SORCE aboard a Pegasus XL rocket is scheduled for mid-December 2002. Launch site is Cape Canaveral Air Force Station, Fla.